I'm using Docker 1.12.3 and I'm trying to create an image on top of Node + Yarn. When I run
docker build -t alansouzati/testing . --build-arg HTTPS_PROXY=http://PROXY:PORT
After some investigation I realised that my base image was the problem, I was using:
did the trick.
I guess Alpine node is to small and is removing something that is important for the proxy/network configuration